70% (1996)

66% (2005)

63% (2008)

76% (2003)

62% (2000)

67% (2006)

76% (2001)

74% (2002)

68% (2001)

68% (2002)

59% (2008)

71% (2003)

62% (2005)

56% (2004)

65% (1998)

53% (2006)